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truncate: ignore whitespace in --size parameters

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Without this, `truncate -s '> -1' F` would truncate F to length 0,
and `truncate -s " +1" F` would truncate F to 1 byte.  Now, each
elicits a diagnostic.
* src/truncate.c: Skip leading white space in the --size option
argument and any white space after one of the relative modifiers,
so that the presence of a +/- modifier can be detected reliably.
* tests/misc/truncate-parameters: Add tests for the above.
This commit is contained in:
Pádraig Brady
2008-06-29 01:55:03 +01:00
committed by Jim Meyering
parent 9396eb9037
commit 760bc6f7e7
2 changed files with 12 additions and 0 deletions
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6
src/truncate.c
View File

@@ -286,6 +286,9 @@ main (int argc, char **argv)
break;
case 's':
/* skip any whitespace */
while (isspace (*optarg))
optarg++;
switch (*optarg)
{
case '<':
@@ -305,6 +308,9 @@ main (int argc, char **argv)
optarg++;
break;
}
/* skip any whitespace */
while (isspace (*optarg))
optarg++;
if (*optarg == '+' || *optarg == '-')
{
if (rel_mode)

6
tests/misc/truncate-parameters
View File

@@ -40,4 +40,10 @@ truncate --io-blocks --reference=file file && fail=1
# must specify valid numbers
truncate --size="invalid" file && fail=1
# spaces not significant around size
truncate --size="> -1" file && fail=1
truncate --size=" >1" file || fail=1 #file now 1
truncate --size=" +1" file || fail=1 #file now 2
test $(stat --format %s file) = 2 || fail=1
(exit $fail); exit $fail